Where is the break at? Do you see a leak outside the firewall or is the leak from a drain? If it is from the drain you probably have a bad heater core. The solid lines on most heater cores run through the firewall and you should not have any soft lines inside the firewall. If you are just looking for a patch for a hose outside the firewall I would suggest you replace it. Otherwise you could cut the hose where the leak is, insert a solid piece of tubing and lock it down with hose clamps. Please just do not make that a long term fix.
SOURCE: heater blower motor
Did you check to see if is the blower resistor for the fan. Sometimes they go out one step at a time or all at once.
SOURCE: coolent leak on fire wall in engine compartment on pasnger side
Hi , if you lift up your passenger side floor carpet and check underneath if there any coolant. If it`s dry you know the leak is in the engine bay ,if it`s wet could be either inside or outside of the firewall. In the engine bay check the hose clamps on both side of the hose if you can tight them or if one a those spring clamps try to reposition them. If you have hose clamp right at the firewall then you can easily change the hoses otherwise you have to access it from under or worst case behind the dash. Hope that helps.
SOURCE: My 02 Jeep Liberty is a Florida car. I have no
I think your air temperature mode actuator is broken but your heater core could be plugged as well.
If one of the two coolant hoses going to the firewall in the engine compartment is significantly warmer than the other then your heater core is plugged and will need backwashed or replaced
It should be easy to check the mode actuator it is located behind the glove compartment and is retained by two screws. If you pull it off you will be able to see if it is broken or not. If you need more information please respond.
What the actuator usually does inside is this unit is a circuit board, motor and small plastic round gears. The gears then rotate the actuator, which in turn opens and closes the damper allowing the air to pass through the heater core.
What happens is some of the little teeth break off creating a gap on the gear wheel. This gap prevents the gears from driving the actuator shaft..
SOURCE: Replace a cabin filter on 2003 chevy silverado
your truck is not equipped with cabin filters, they came later on in newer models.
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